For other articles in the article group the subgroup index is entered, but not for this article.
Explanation:
Normally, articles belonging to an article group are described in a single article table. You can also choose to show several article tables under one article group (but always with the same properties). In this case, each article is divided into a subgroup. In this case, the position of the article for the relevant subgroup must be indicated in the import file.
Solution:
When a sub-group is chosen within an article group, all articles within the group must also be classified in a sub-group. The position must therefore be filled for all articles in that group.
